At least five people have been shot at a rural southwestern Kentucky high school .

The suspect in the incident at Marshall County High School in Benton, Kentucky, has been apprehended, according to officials with Marshall County Emergency Management.

Kentucky Gov. Matt Bevin tweeted that at least one of the victims died as a result of their injuries, but said there is "much yet unknown" as police and emergency services continue to operate at the school.

Kentucky State Police have also confirmed one person has died.

Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) are at the scene to assist.

So far, the motive for the shooting or the identity of the shooter is unknown.

It has been reported that the suspect opened fire as students were heading to their classes.

Around 30,000 people live in Marshall County, about 115 miles northwest of Nashville. Benton is the county seat.

Kentucky State Police Detective Jody Cash said that the "situation is secure and is no longer active."

Cash confirmed that one suspect is in custody at the campus, but could not give any further details.

A Marshall County deputy apprehended the gunman within 15 minutes of the shooting, according to state police.

The FBI is en route to the scene.

The ages of the victims and and extent of their injuries are currently unknown.

Four patients were transported by medical helicopter to Vanderbilt University Medical Center in Nashville.

The school has an enrollment of 1,146 students in grades 10 through 12.

The Governor of Kentucky, Matt Bevin added on Twitter that the incident was a "tremendous tragedy".

"This is a tremendous tragedy and speaks to the heartbreak present in our communities.

"It is unbelievable that this would happen in a small, close-knit community like Marshall County. As there is still much unknown, I encourage people to love on each other at this time. Do not speculate, but come alongside each other in support and allow the facts to come out."